I have a Crockpot that has preset settings to cook on high for 4 or 6 hours or cook on low for 8 or 10 hours. The Crockpot model is "Crock-Pot® SCCPVL605-B Cook and Carry Smart Pot Slow Cooker" and the control panel looks like this:
However, I've noticed many recipes call for cooking for shorter durations on low such as this recipe that calls for cooking for 2-3 hours on high or 4-5 hours on low.
First of all, this seems odd as the official crockpot website conversion table says the equivalent of 3 hours on high is 7 hours on low (not 4-5). I'm partial to the low setting as I feel it will probably taste better. So should I just set it to 8 hours on low since it's close enough to the conversion chart's recommended 7?
Or should I follow the recipe as close as possible and use the 8 hour low preset and remove the food after 4 hours? A potential problem with this approach is that I've read that with the presets a certain amount of time is needed to reach the "simmer point" and if you remove it too early your food may not reach the desired internal temperature and therefore be unsafe to eat.
Ultimately, my question boils down to which preset should I use and for how long when the presets don't match the recipe?
Also, please note that my question is different than this question on overcooking as I'm wondering if I may be undercooking.